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SCHEDULE I - Parent Company Information - Condensed Statements of Comprehensive Income (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Condensed Financial Statements, Captions [Line Items] |  |  |
Net income | $ 43,231 | $ 62,158 | $ 14,069
Other comprehensive (loss) income: |  |  |
Currency translation adjustment | (770) | 896 | (868)
Derivative instruments |  |  |
Unrealized gain on derivative instruments | 533 | 1,061 | 69
Net (loss) gain recognized in other comprehensive income | (237) | 1,957 | (799)
Tax benefit (expense) related to items of other comprehensive income | 54 | (686) | 275
Total comprehensive income | 43,048 | 63,429 | 13,545
Parent Company [Member] |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |
Net income | 43,231 | 62,158 | 14,069
Other comprehensive (loss) income: |  |  |
Currency translation adjustment | (770) | 896 | (868)
Derivative instruments |  |  |
Unrealized gain on derivative instruments | 533 | 1,061 | 69
Net (loss) gain recognized in other comprehensive income | (237) | 1,957 | (799)
Tax benefit (expense) related to items of other comprehensive income | 54 | (686) | 275
Other comprehensive (loss) income | (183) | 1,271 | (524)
Total comprehensive income | $ 43,048 | $ 63,429 | $ 13,545

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